EM to PX Converter
Convert between EM and PX units with precision for perfect responsive web design
Conversion Parameters
This is the font size of the parent element (usually 16px by default in browsers)
Conversion Results
Input Value
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Converted Value
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Enter values to see the conversion formula.
How This Conversion Works
Detailed explanation of the conversion will appear here.
📊 Common EM to PX Conversions
| EM Value | PX Equivalent (16px base) | PX Equivalent (14px base) | PX Equivalent (18px base) |
|---|---|---|---|
| 0.5em | 8px | 7px | 9px |
| 0.75em | 12px | 10.5px | 13.5px |
| 1em | 16px | 14px | 18px |
| 1.25em | 20px | 17.5px | 22.5px |
| 1.5em | 24px | 21px | 27px |
| 2em | 32px | 28px | 36px |
| 3em | 48px | 42px | 54px |
Note: These values are calculated by multiplying the EM value by the base font size.
📚 CSS Units Best Practices
When to Use EM
Use EM for scalable, relative sizing - especially for typography, margins, and padding that should scale with text.
When to Use PX
Use PX for fixed sizing - borders, media queries, or when you need precise control regardless of parent size.
REM vs EM
REM is relative to root (html) font size, while EM is relative to parent element. REM is more predictable for global scaling.
Responsive Design
Combine EM/REM for typography with media queries using PX for responsive breakpoints.
Accessibility
EM/REM units respect user font size preferences, making your site more accessible.
Calculations
Use CSS calc() function to combine units like: calc(1rem + 2px) for flexible yet precise layouts.
Dark Mode
Note: This converter provides precise calculations based on the CSS specification where 1em equals the current font size of the element. For responsive design, consider using REM units for more predictable scaling.